The Together union says there is deep community concern over the sacking of Queensland's Parliamentary Crime and Misconduct Committee (PCMC) last week.

More than 8,000 people have signed a union petition calling for Independent Liz Cunningham to be reinstated as chair of the PCMC, which oversees the Crime and Misconduct Commission.

All members of the committee were dumped by the State Government amid claims of bias.

Four out of seven members of a newly installed PCMC, including the chairman, are members of the LNP.

Union spokesman Alex Scott says the Government has gone too far.

"This is above party politics, this is about what's best for Queensland and making sure that we continue to have strong government which has processes that are independent of the party in Government of the day.

Mr Scott says support for Ms Cunningham is coming from across the political spectrum.

"People need to remember that Liz Cunningham was the politician who delivered the Borbidge government its one-seat majority," he said.

"She's always been seen as someone who is willing to deal with political parties based on their merits, not their ideologies and she stood up and said that the transcripts of the hearings needed to be made public, and as soon as she did that she was sacked by this Government."